dma_buf_kunmap(9) centos man page | unix.com

DMA_BUF_KUNMAP(9)					   Device drivers infrastructure					 DMA_BUF_KUNMAP(9)

NAME
       dma_buf_kunmap - Unmap a page obtained by dma_buf_kmap.

SYNOPSIS
       void dma_buf_kunmap(struct dma_buf * dmabuf, unsigned long page_num, void * vaddr);

ARGUMENTS
       dmabuf
	   [in] buffer to unmap page from.

       page_num
	   [in] page in PAGE_SIZE units to unmap.

       vaddr
	   [in] kernel space pointer obtained from dma_buf_kmap.

DESCRIPTION
       This call must always succeed.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							 DMA_BUF_KUNMAP(9)